Tussocks: Biogenic Silica Hot-Spots in a Riparian Wetland

Opdekamp, Wout; Teuchies, Johannes; Vrebos, Dirk; Chormanski, Jarek; Schoelynck, Jonas; Diggelen, Rudy van; Meire, Patrick; Struyf, Eric

doi:10.1007/s13157-012-0341-5

Cited by 21 publications

(15 citation statements)

References 39 publications

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“…; Opdekamp et al . ). Also, sedges in wetlands are the main food for numerous mammalian herbivores in the growing season and are one of the few plants available to herbivores in winter (Batzli & Jung ; Batzli & Henttonen ).…”

Section: Introductionmentioning

confidence: 97%

“…Here, we examined the effect of both biotic and abiotic factors on the accumulation of Si in plants. We chose sedges (Cyperaceae) as the model plants, as they are wellknown reservoirs of Si and play a crucial role in Si cycling (Hodson et al 2005;Opdekamp et al 2012). Also, sedges in wetlands are the main food for numerous mammalian herbivores in the growing season and are one of the few plants available to herbivores in winter (Batzli & Jung 1980;Batzli & Henttonen 1990).…”

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confidence: 99%

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Plant–herbivore interactions: silicon concentration in tussock sedges and population dynamics of root voles

et al. 2014

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Summary1. It has been hypothesized that the induction of silicon (Si)-based plant defence in response to herbivore damage may engender rodent population cycles. Many studies have also considered accumulation of Si as a process controlled by geo-hydrological factors. 2. To test these ideas, we investigated the relationship between concentration of Si in fibrous tussock sedge (Carex appropinquata) and the population density of a major sedge consumer, the root vole (Microtus oeconomus), in field enclosures in natural habitat under a variety of natural water regimes and weather conditions. 3. We found that a high density of voles at the end of summer resulted in the immediate accumulation of Si by rhizomes, followed by accumulation of Si in leaves with a 1-year lag time. The level of river flooding in the same year had an additional impact on Si concentration in rhizomes but did not affect silicification of leaves. 4. Overwinter changes in concentration of Si in sedges were influenced by fluctuations in ambient temperature and the depth of snow cover (multiple freeze-thaw cycles), thus affecting the quality of winter food available for voles. 5. Smaller voles had lower mortality during early winter than large voles, which seemed to be connected with changes in the quality of the autumn rather than the winter food base. Winter survival of voles was not associated with Si concentration in their faeces, however. 6. Our results suggest that changes in Si concentration in fibrous tussock sedge can be induced by changes in vole population density and are also additionally affected by the amount of flooding and weather conditions.

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Section: Introductionmentioning

confidence: 97%

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confidence: 99%

Plant–herbivore interactions: silicon concentration in tussock sedges and population dynamics of root voles

et al. 2014

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“…The difference between these sedges and the mown meadows located further outwards the river is the absolute hight of the sedges which forms ca 30 cm high root-soil tussocks, on which a green part of vegetation grows [7]. The model may overestimate interception capacity due to including tussocks height in calculation of the LiDAR statistics of green part.…”

Section: Resultsmentioning

confidence: 99%

Towards rainfall interception capacity estimation using ALS LiDAR data

Berezowski¹,

Chormański²,

Kleniewska³

et al. 2015

2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)

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In this study we develop a spatial model for interception capacity of vegetation based on LiDAR data. The study is conducted in the natural wetland river valley dominated meadows, reeds and small bushes. The multiple regression model was chosen to relate the field measurements of interception capacity and LiDAR statistics at 2m grid. The optimal model was chosen by stepwise selection and further manual variables selection resulting in the r 2 of 0.52 and the residual standard error of 0.27 mm. The model preserved the vegetation pattern spatially and showed reasonable estimates for both vegetation covered and not covered by field sampling. The model was, however, affected by LiDAR measurements corrupted by river inundation. The results show good perspective for using LiDAR data for interception capacity estimation.

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“…In the Biebrza mires (Poland), for example, annual hay removal affected the P concentrations in vascular plants, and therefore, N:P stoichiometry was severely altered (Venterink, Kardel, Kotowski, Peeters, & Wassen, ). Opdekamp et al () showed in the same Biebrza mires that Si in grasses and sedges was significantly lower when frequently mowed, most likely due to an age effect of the tussock forming shoots in the unmown situation. In contrast, Massey, Smith, Lambin, and Hartley () and McNaughton, Tarrants, McNaughton, and Davis () showed that Si concentration in grasses is positively correlated to grazing pressure by voles.…”

Section: Introductionmentioning

confidence: 91%

Consequences of different cutting regimes on regrowth and nutrient stoichiometry of Sparganium erectum L. and Potamogeton natans L.

Bal

Verschoren

Sara

et al. 2017

River Research & Apps

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Aquatic vegetation forms an essential component in freshwater ecosystems but due to changed environmental and anthropogenic conditions often needs management to reduce nuisance for human land-use. In this paper, the authors looked at the regrowth of two macrophyte species (Potamogeton natans and Sparganium erectum) in two lowland rivers under different cutting treatments. After an initial cross-sectional transect was manually removed from bank to bank at the beginning of the growth season, a monthly repetitive removal of biomass in plots on that transect was done during the rest of the growth season (testing frequency of mowing). Additional new transects were also cut in subsequent months (testing timing of mowing). Finally, biomass was repetitively removed in plots in those additional transects too (testing frequency of mowing × timing of mowing). The biomass at the end of the growth season was analysed for C, N, P, and Si. It was demonstrated that timing and frequency of vegetation cutting has an important effect on the capacity and rate of species' recovery and therefore on the efficiency of the applied management. Nutrient stoichiometry of the regrown biomass was directly affected by cutting. Caused by differences in the applied timing and frequency of the cutting, C/N and N/P ratios and BSi concentrations were highly variable. Yet, overall, there was a clear tendency towards a higher C/N ratio and BSi concentration and lower N/P ratio in biomass that recovered after cutting. This human impact on the quantity and quality of autochthonous organic matter may have knock-on effects on the decomposers food web and mineralization process.

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Tussocks: Biogenic Silica Hot-Spots in a Riparian Wetland

Cited by 21 publications

References 39 publications

Plant–herbivore interactions: silicon concentration in tussock sedges and population dynamics of root voles

Plant–herbivore interactions: silicon concentration in tussock sedges and population dynamics of root voles

Towards rainfall interception capacity estimation using ALS LiDAR data

Consequences of different cutting regimes on regrowth and nutrient stoichiometry of Sparganium erectum L. and Potamogeton natans L.

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